Electrical Help - 1958

[Eric A.]

Testing Guidance Request: I am in the process of restoring a horn relay switch and the voltage regulator for my 1958. Does anyone know how to test these items on a bench and not hooked up in the car. I am open to suggestions. My local parts stores said they could not test these items anymore with there equipment. I am willing to buy any test equipment if someone can guide me in the right direction. Thanks for your help. Eric

[John H.]

Re: Electrical Help - 1958

Testing Guidance Request: I am in the process of restoring a horn relay switch and the voltage regulator for my 1958. Does anyone know how to test these items on a bench and not hooked up in the car. I am open to suggestions. My local parts stores said they could not test these items anymore with there equipment. I am willing to buy any test equipment if someone can guide me in the right direction. Thanks for your help. Eric

Eric -

The applicable Passenger Car Shop Manuals of that era have extensive diagnostic/test/adjustment information for the voltage regulator, in the "Engine Electrical" chapter. Those manuals are available from the NCRS Store ("NCRS Shop" icon at the top of the page).

[Philip P.]

Re: Electrical Help - 1958

The horn relay is fairly straight forward 12volts to the center terminal ground the S terminal and you should have 12v to the horn. The regulator requires some special equipment to do a bench check but can be done with the gernerator battery and regulator out of the car. I can send the pages from the shop manual if you want.
Phil

horn relay.jpg